Seahawks coach Pete Carroll said Tuesday on 710 ESPN Seattle that guard James Carpenter suffered a concussion during the Super Bowl, but the team didn't realize it during the game because he never came out, the Everett Herald reports.

Carpenter played all 54 offensive snaps during the 28-24 loss to New England, and it's unclear when he suffered the concussion. He's scheduled to reach unrestricted free agency this offseason.

The Seahawks have four players listed as probable active for Thursday's game against the 49ers, including Marshawn Lynch (back), guard James Carpenter (ankle), wide receiver Jermaine Kearse (ankle) and cornerback Marcus Burley (hamstring).

Lynch totaled 82 yards on 18 touches against Arizona in Week 12 while dealing with a back issue, but he reportedly had a good week of practice before being listed as probable for Thursday's game.